package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;

/**
 * @Description
 * @Author Chrisn
 * @Date 2025/7/14
 */
@Slf4j
public class refreshInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;

    public refreshInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.从请求头中中获取token
        String token = request.getHeader("authorization");
        log.debug("从请求头中拿到的token为{}",token);
        if (StrUtil.isBlank(token)){
            return true;
        }
        //2.获取token中的用户
        String key= LOGIN_USER_KEY + token;
        log.debug("redis中存user信息的key是{}",key);
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);
        log.debug("userMap的信息是{}",userMap.toString());
        //3.判断用户是否存在
        if(userMap.isEmpty()){
            return true;
        }
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        //5.存在，保存用户信息到Threadlocal
        UserHolder.saveUser(userDTO);
        //刷新token有效期
        stringRedisTemplate.expire(key,LOGIN_USER_TTL, TimeUnit.MINUTES);
        //6.放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
